This room is ______ to electric fish. The eel in the tank behind me can produce a strong ______ of electricity to stun its prey, but most of the fish in here produce only weak electrical ______ that are useful for ________, locating food, and even fo...
Before I tell you about the interesting ______ related to Tyrannosaurus rex, I need to review something we studied last semester --- the difference between what are commonly called cold-blooded and warm-blooded animals. In warm-blooded animals, birds...
To us, the environment in which fish dwell often seems cold, dark, and ______. But there are advantages to living in water, and they have played an important role in making fish what they are. One is that water isn't subject to sudden temperature cha...
Word comes from California of a new weapon in the war on _______ pests. Two scientists working for a firm in Anaheim, California, have developed a method to ________ insects without using dangerous chemicals. The new poison? Hot air. The basic idea i...
The winds of a tornado are the most violent and ______ ones on Earth. Any of you who have seen one knows very well how frightening and powerful they are. What's interesting about them is that scientists don't actually know exactly why _______ occur....
Since we've been discussing alternative fuels lately, I wanted to pass onto you some information I read about a new fuel that's been in the news a lot lately. It's called A-21.It's ______ of water and a chemical known as ______. It seems to be avery...
Scientists are always on the lookout for ______ sources of energy. Today we're going to discuss one that's so plentiful they say it could supply more energy than all the coal and oil in the world. It's found in something called gas ______ and, believ...
The Old Canada Roadis a ______ _____ between the Canadian province of ______ and ______, in the northeast corner of the United States.Yes, it really was lost, and finding it again was a complex process that involved state-of-the-art technology. How t...
Now, you've been reading articles about the tremendous damage done to life and property by earthquakes.That's why ______ have been working so hard to develop methods of earthquake ______.We can now predict earthquake [assertively] fairly well, but th...
Not long ago, some of you may have read about a team of mountain-climbing scientists who helped to ______ the ______ of the highest mountain in the world: Mt. Everest. Of course, the elevation of Mt. Everestwas determined many years ago, using tradit...
I'd like to begin by thanking Dr. Kane for inviting me tobe here today. Although I'm not a geologist, I have been collecting mineralsfor years. My collection is really______because I've traveled all over the world to find them. Today I've brought a f...
Today I want to talk about the Earth's last major____________shift, at the end of thelast ____________. But first, let's backup a moment and review what we know about climatic change in general. First, wedefined climate as____________patterns ofweath...
S: This doesnt have anything to do with the lecture, Dr. Brown. It's just something I was wondering about. T: I'm always glad to entertain questions. S: What I want to know is, with all our space exploration, aren't astronomers concerned that were po...
Some of you may be familiar with the Apollo programs geological studies of the moon during the 1960s. But you may not be aware of the _______research that ______ those studies. The work of two early researchers was very important in determining the n...
Most people think of astronomers as people who spend their time in cold ______ ______through telescopes every night. In fact, a typical astronomer spends most of his or her time analyzing data and may only be at the telescope a few weeks of the year....
